033 (3887B)
1 #!/usr/bin/env bash 2 # group: rw auto quick 3 # 4 # Test aligned and misaligned write zeroes operations. 5 # 6 # Copyright (C) 2012 Red Hat, Inc. 7 # 8 # This program is free software; you can redistribute it and/or modify 9 # it under the terms of the GNU General Public License as published by 10 # the Free Software Foundation; either version 2 of the License, or 11 # (at your option) any later version. 12 # 13 # This program is distributed in the hope that it will be useful, 14 # but WITHOUT ANY WARRANTY; without even the implied warranty of 15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 # GNU General Public License for more details. 17 # 18 # You should have received a copy of the GNU General Public License 19 # along with this program. If not, see <http://www.gnu.org/licenses/>. 20 # 21 22 # creator 23 owner=pbonzini@redhat.com 24 25 seq=`basename $0` 26 echo "QA output created by $seq" 27 28 status=1 # failure is the default! 29 30 _cleanup() 31 { 32 _cleanup_test_img 33 } 34 trap "_cleanup; exit \$status" 0 1 2 3 15 35 36 # get standard environment, filters and checks 37 . ./common.rc 38 . ./common.filter 39 40 _supported_fmt generic 41 _supported_proto generic 42 _unsupported_imgopts "subformat=streamOptimized" 43 44 45 size=128M 46 _make_test_img $size 47 48 do_test() 49 { 50 local align=$1 51 local iocmd=$2 52 local img=$3 53 if [ "$IMGOPTSSYNTAX" = "true" ] 54 then 55 IO_OPEN_ARG="$img" 56 IO_EXTRA_ARGS="--image-opts" 57 else 58 IO_OPEN_ARG="-o driver=$IMGFMT,file.align=$align blkdebug::$img" 59 IO_EXTRA_ARGS="" 60 fi 61 { 62 echo "open $IO_OPEN_ARG" 63 echo $iocmd 64 } | $QEMU_IO $IO_EXTRA_ARGS 65 } 66 67 echo 68 echo "=== Test aligned and misaligned write zeroes operations ===" 69 70 for write_zero_cmd in "write -z" "aio_write -z"; do 71 for align in 512 4k; do 72 echo 73 echo "== preparing image ==" 74 do_test $align "write -P 0xa 0x200 0x400" "$TEST_IMG" | _filter_qemu_io 75 do_test $align "write -P 0xa 0x20000 0x600" "$TEST_IMG" | _filter_qemu_io 76 do_test $align "$write_zero_cmd 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 77 78 echo 79 echo "== verifying patterns (1) ==" 80 do_test $align "read -P 0xa 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 81 do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 82 do_test $align "read -P 0xa 0x20400 0x200" "$TEST_IMG" | _filter_qemu_io 83 84 echo 85 echo "== rewriting zeroes ==" 86 do_test $align "write -P 0xb 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io 87 do_test $align "$write_zero_cmd 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io 88 89 echo 90 echo "== verifying patterns (2) ==" 91 do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 92 93 echo 94 echo "== rewriting unaligned zeroes ==" 95 do_test $align "write -P 0xb 0x0 0x1000" "$TEST_IMG" | _filter_qemu_io 96 do_test $align "$write_zero_cmd 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 97 98 echo 99 echo "== verifying patterns (3) ==" 100 do_test $align "read -P 0xb 0x0 0x200" "$TEST_IMG" | _filter_qemu_io 101 do_test $align "read -P 0x0 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 102 do_test $align "read -P 0xb 0x400 0xc00" "$TEST_IMG" | _filter_qemu_io 103 104 echo 105 done 106 done 107 108 _cleanup_test_img 109 110 # Trigger truncate that would shrink qcow2 L1 table, which is done by 111 # clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes() 112 113 echo 114 echo "=== Test misaligned write zeroes via truncate ===" 115 echo 116 117 # any size will do, but the smaller the size the smaller the required image 118 CLUSTER_SIZE=$((4 * 1024)) 119 L2_COVERAGE=$(($CLUSTER_SIZE * $CLUSTER_SIZE / 8)) 120 _make_test_img $(($L2_COVERAGE * 2)) 121 122 do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io 123 # next L2 table 124 do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io 125 126 # only interested in qcow2 here; also other formats might respond with 127 # "not supported" error message 128 if [ $IMGFMT = "qcow2" ]; then 129 do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io 130 fi 131 132 do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io 133 134 # success, all done 135 echo 136 echo "*** done" 137 rm -f $seq.full 138 status=0